Question

Which of these is not an example of a fixed pulley?
A. Well
B. Flagpoles
C. Crane
D. None of these

Answer 1

Hint: A pulley is a wheel that is positioned on an axle or shaft to support the movement and direction change of a taut cable or belt, as well as the transfer of power between the shaft and the cable or belt. A block is a pulley that is supported by a frame or shell and does not supply power to a shaft but is used to direct the cable or exert a force.The pulley is referred to as a sheave.

Complete answer:
• A fixed pulley is a simple mechanism that consists of a wheel with a groove and a rope that fits into the groove. A fixed pulley differs from a moving pulley in that the wheel does not rotate.
• When force is given to the rope, it simply moves across the wheel's groove (when the rope is pulled).
• Some examples which comes under fixed pulley are:-
Wells: Traditional "wishing well" water wells use a simple pulley system to lift the bucket out of the well.
Flagpoles: Flagpoles employ pulleys to raise and lower the flag. When you pull the string on the pulley, the flag moves up and down the pole.
• Both of the above given are instances of fixed pulleys. Crane, on the other hand, is an example of a movable pulley that can be moved up and down and is attached to a ceiling or other object by two lengths of the same rope.

So, the correct option is C.

Note: It should be noted that a fixed pulley system can be used to raise an object above your head. You can also take use of gravity by using this style of pulley. Furthermore, by putting weights to the end of the rope that you pull, you can reduce the amount of force required.